高立堂  董毓利  袁爱民　 （青岛建筑工程学院266033）

[提要]  对无粘结预应力混凝土连续板在中跨受火下的反应进行试验研究，得出了板的温度场分布、板的变
形情况及支座反力的变化情况，并得出了负弯矩钢筋长度、预应力度对无粘结预应力混凝土连续板的影响。为今后无粘结预应力混凝土板火灾行为研究提供了依据。
[关键词]  火灾  混凝土  连续板  温度场  负弯矩钢筋长度  预应力度  支座反力

The behavior of continuous slabs of unbonded prestressed concrete with the middle span under fire are investigated. From the test results, the regularities of temperature field and deformation are presented. The effects of different lengths of negative moment reinforcement and prestressing level on the behavior of the slabs are also suggested. It provides a basis for further research to explore fire behavior of prestressed concrete structures with unbonded tendon.
Keywords:  fire; continuous slab; temperature field; negative moment reinforcement; prestressing level; reaction

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